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linux_dsm_epyc7002/drivers/net/ethernet/netronome/nfp/nfp_net.h
Jakub Kicinski 6d6770755f nfp: add support for offload of XDP programs 
Most infrastructure can be reused, provide separate handling
of context offsets and exit codes.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-04 14:56:16 -04:00

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/*
* Copyright (C) 2015 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* nfp_net.h
* Declarations for Netronome network device driver.
* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
* Jason McMullan <jason.mcmullan@netronome.com>
* Rolf Neugebauer <rolf.neugebauer@netronome.com>
*/
#ifndef _NFP_NET_H_
#define _NFP_NET_H_
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/io-64-nonatomic-hi-lo.h>
#include "nfp_net_ctrl.h"
#define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args)
#define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args)
#define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args)
#define nn_dbg(nn, fmt, args...) netdev_dbg((nn)->netdev, fmt, ## args)
#define nn_warn_ratelimit(nn, fmt, args...) \
do { \
if (unlikely(net_ratelimit())) \
netdev_warn((nn)->netdev, fmt, ## args); \
} while (0)
/* Max time to wait for NFP to respond on updates (in seconds) */
#define NFP_NET_POLL_TIMEOUT 5
/* Interval for reading offloaded filter stats */
#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)
/* Bar allocation */
#define NFP_NET_CTRL_BAR 0
#define NFP_NET_Q0_BAR 2
#define NFP_NET_Q1_BAR 4 /* OBSOLETE */
/* Max bits in DMA address */
#define NFP_NET_MAX_DMA_BITS 40
/* Default size for MTU and freelist buffer sizes */
#define NFP_NET_DEFAULT_MTU 1500
/* Maximum number of bytes prepended to a packet */
#define NFP_NET_MAX_PREPEND 64
/* Interrupt definitions */
#define NFP_NET_NON_Q_VECTORS 2
#define NFP_NET_IRQ_LSC_IDX 0
#define NFP_NET_IRQ_EXN_IDX 1
/* Queue/Ring definitions */
#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */
#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */
#define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \
NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)
#define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)
#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */
#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */
#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */
#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */
#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */
#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */
#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */
/* Offload definitions */
#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))
#define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
#define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
/* Forward declarations */
struct nfp_net;
struct nfp_net_r_vector;
/* Convenience macro for writing dma address into RX/TX descriptors */
#define nfp_desc_set_dma_addr(desc, dma_addr) \
do { \
__typeof(desc) __d = (desc); \
dma_addr_t __addr = (dma_addr); \
\
__d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \
__d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \
} while (0)
/* TX descriptor format */
#define PCIE_DESC_TX_EOP BIT(7)
#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0)
#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0)
/* Flags in the host TX descriptor */
#define PCIE_DESC_TX_CSUM BIT(7)
#define PCIE_DESC_TX_IP4_CSUM BIT(6)
#define PCIE_DESC_TX_TCP_CSUM BIT(5)
#define PCIE_DESC_TX_UDP_CSUM BIT(4)
#define PCIE_DESC_TX_VLAN BIT(3)
#define PCIE_DESC_TX_LSO BIT(2)
#define PCIE_DESC_TX_ENCAP BIT(1)
#define PCIE_DESC_TX_O_IP4_CSUM BIT(0)
struct nfp_net_tx_desc {
union {
struct {
u8 dma_addr_hi; /* High bits of host buf address */
__le16 dma_len; /* Length to DMA for this desc */
u8 offset_eop; /* Offset in buf where pkt starts +
* highest bit is eop flag.
*/
__le32 dma_addr_lo; /* Low 32bit of host buf addr */
__le16 mss; /* MSS to be used for LSO */
u8 l4_offset; /* LSO, where the L4 data starts */
u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */
__le16 vlan; /* VLAN tag to add if indicated */
__le16 data_len; /* Length of frame + meta data */
} __packed;
__le32 vals[4];
};
};
/**
* struct nfp_net_tx_buf - software TX buffer descriptor
* @skb: sk_buff associated with this buffer
* @dma_addr: DMA mapping address of the buffer
* @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags)
* @pkt_cnt: Number of packets to be produced out of the skb associated
* with this buffer (valid only on the head's buffer).
* Will be 1 for all non-TSO packets.
* @real_len: Number of bytes which to be produced out of the skb (valid only
* on the head's buffer). Equal to skb->len for non-TSO packets.
*/
struct nfp_net_tx_buf {
union {
struct sk_buff *skb;
void *frag;
};
dma_addr_t dma_addr;
short int fidx;
u16 pkt_cnt;
u32 real_len;
};
/**
* struct nfp_net_tx_ring - TX ring structure
* @r_vec: Back pointer to ring vector structure
* @idx: Ring index from Linux's perspective
* @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue
* @qcp_q: Pointer to base of the QCP TX queue
* @cnt: Size of the queue in number of descriptors
* @wr_p: TX ring write pointer (free running)
* @rd_p: TX ring read pointer (free running)
* @qcp_rd_p: Local copy of QCP TX queue read pointer
* @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer
* (used for .xmit_more delayed kick)
* @txbufs: Array of transmitted TX buffers, to free on transmit
* @txds: Virtual address of TX ring in host memory
* @dma: DMA address of the TX ring
* @size: Size, in bytes, of the TX ring (needed to free)
*/
struct nfp_net_tx_ring {
struct nfp_net_r_vector *r_vec;
u32 idx;
int qcidx;
u8 __iomem *qcp_q;
u32 cnt;
u32 wr_p;
u32 rd_p;
u32 qcp_rd_p;
u32 wr_ptr_add;
struct nfp_net_tx_buf *txbufs;
struct nfp_net_tx_desc *txds;
dma_addr_t dma;
unsigned int size;
} ____cacheline_aligned;
/* RX and freelist descriptor format */
#define PCIE_DESC_RX_DD BIT(7)
#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0)
/* Flags in the RX descriptor */
#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15))
#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14))
#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13))
#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12))
#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11))
#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10))
#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9))
#define PCIE_DESC_RX_BPF cpu_to_le16(BIT(8))
#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7))
#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6))
#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5))
#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4))
#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3))
#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2))
#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1))
#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0))
#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \
PCIE_DESC_RX_TCP_CSUM | \
PCIE_DESC_RX_UDP_CSUM | \
PCIE_DESC_RX_I_IP4_CSUM | \
PCIE_DESC_RX_I_TCP_CSUM | \
PCIE_DESC_RX_I_UDP_CSUM)
#define PCIE_DESC_RX_CSUM_OK_SHIFT 1
#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL)
#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \
PCIE_DESC_RX_CSUM_OK_SHIFT)
struct nfp_net_rx_desc {
union {
struct {
u8 dma_addr_hi; /* High bits of the buf address */
__le16 reserved; /* Must be zero */
u8 meta_len_dd; /* Must be zero */
__le32 dma_addr_lo; /* Low bits of the buffer address */
} __packed fld;
struct {
__le16 data_len; /* Length of the frame + meta data */
u8 reserved;
u8 meta_len_dd; /* Length of meta data prepended +
* descriptor done flag.
*/
__le16 flags; /* RX flags. See @PCIE_DESC_RX_* */
__le16 vlan; /* VLAN if stripped */
} __packed rxd;
__le32 vals[2];
};
};
#define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)
struct nfp_net_rx_hash {
__be32 hash_type;
__be32 hash;
};
/**
* struct nfp_net_rx_buf - software RX buffer descriptor
* @frag: page fragment buffer
* @dma_addr: DMA mapping address of the buffer
*/
struct nfp_net_rx_buf {
void *frag;
dma_addr_t dma_addr;
};
/**
* struct nfp_net_rx_ring - RX ring structure
* @r_vec: Back pointer to ring vector structure
* @cnt: Size of the queue in number of descriptors
* @wr_p: FL/RX ring write pointer (free running)
* @rd_p: FL/RX ring read pointer (free running)
* @idx: Ring index from Linux's perspective
* @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist
* @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue
* @qcp_fl: Pointer to base of the QCP freelist queue
* @qcp_rx: Pointer to base of the QCP RX queue
* @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer
* (used for free list batching)
* @rxbufs: Array of transmitted FL/RX buffers
* @rxds: Virtual address of FL/RX ring in host memory
* @dma: DMA address of the FL/RX ring
* @size: Size, in bytes, of the FL/RX ring (needed to free)
* @bufsz: Buffer allocation size for convenience of management routines
* (NOTE: this is in second cache line, do not use on fast path!)
*/
struct nfp_net_rx_ring {
struct nfp_net_r_vector *r_vec;
u32 cnt;
u32 wr_p;
u32 rd_p;
u16 idx;
u16 wr_ptr_add;
int fl_qcidx;
int rx_qcidx;
u8 __iomem *qcp_fl;
u8 __iomem *qcp_rx;
struct nfp_net_rx_buf *rxbufs;
struct nfp_net_rx_desc *rxds;
dma_addr_t dma;
unsigned int size;
unsigned int bufsz;
} ____cacheline_aligned;
/**
* struct nfp_net_r_vector - Per ring interrupt vector configuration
* @nfp_net: Backpointer to nfp_net structure
* @napi: NAPI structure for this ring vec
* @tx_ring: Pointer to TX ring
* @rx_ring: Pointer to RX ring
* @xdp_ring: Pointer to an extra TX ring for XDP
* @irq_idx: Index into MSI-X table
* @rx_sync: Seqlock for atomic updates of RX stats
* @rx_pkts: Number of received packets
* @rx_bytes: Number of received bytes
* @rx_drops: Number of packets dropped on RX due to lack of resources
* @hw_csum_rx_ok: Counter of packets where the HW checksum was OK
* @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK
* @hw_csum_rx_error: Counter of packets with bad checksums
* @tx_sync: Seqlock for atomic updates of TX stats
* @tx_pkts: Number of Transmitted packets
* @tx_bytes: Number of Transmitted bytes
* @hw_csum_tx: Counter of packets with TX checksum offload requested
* @hw_csum_tx_inner: Counter of inner TX checksum offload requests
* @tx_gather: Counter of packets with Gather DMA
* @tx_lso: Counter of LSO packets sent
* @tx_errors: How many TX errors were encountered
* @tx_busy: How often was TX busy (no space)?
* @handler: Interrupt handler for this ring vector
* @name: Name of the interrupt vector
* @affinity_mask: SMP affinity mask for this vector
*
* This structure ties RX and TX rings to interrupt vectors and a NAPI
* context. This currently only supports one RX and TX ring per
* interrupt vector but might be extended in the future to allow
* association of multiple rings per vector.
*/
struct nfp_net_r_vector {
struct nfp_net *nfp_net;
struct napi_struct napi;
struct nfp_net_tx_ring *tx_ring;
struct nfp_net_rx_ring *rx_ring;
int irq_idx;
struct u64_stats_sync rx_sync;
u64 rx_pkts;
u64 rx_bytes;
u64 rx_drops;
u64 hw_csum_rx_ok;
u64 hw_csum_rx_inner_ok;
u64 hw_csum_rx_error;
struct nfp_net_tx_ring *xdp_ring;
struct u64_stats_sync tx_sync;
u64 tx_pkts;
u64 tx_bytes;
u64 hw_csum_tx;
u64 hw_csum_tx_inner;
u64 tx_gather;
u64 tx_lso;
u64 tx_errors;
u64 tx_busy;
irq_handler_t handler;
char name[IFNAMSIZ + 8];
cpumask_t affinity_mask;
} ____cacheline_aligned;
/* Firmware version as it is written in the 32bit value in the BAR */
struct nfp_net_fw_version {
u8 minor;
u8 major;
u8 class;
u8 resv;
} __packed;
static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
u8 resv, u8 class, u8 major, u8 minor)
{
return fw_ver->resv == resv &&
fw_ver->class == class &&
fw_ver->major == major &&
fw_ver->minor == minor;
}
struct nfp_stat_pair {
u64 pkts;
u64 bytes;
};
/**
* struct nfp_net - NFP network device structure
* @pdev: Backpointer to PCI device
* @netdev: Backpointer to net_device structure
* @nfp_fallback: Is the driver used in fallback mode?
* @is_vf: Is the driver attached to a VF?
* @fw_loaded: Is the firmware loaded?
* @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf
* @bpf_offload_xdp: Offloaded BPF program is XDP
* @ctrl: Local copy of the control register/word.
* @fl_bufsz: Currently configured size of the freelist buffers
* @rx_offset: Offset in the RX buffers where packet data starts
* @xdp_prog: Installed XDP program
* @cpp: Pointer to the CPP handle
* @nfp_dev_cpp: Pointer to the NFP Device handle
* @ctrl_area: Pointer to the CPP area for the control BAR
* @tx_area: Pointer to the CPP area for the TX queues
* @rx_area: Pointer to the CPP area for the FL/RX queues
* @fw_ver: Firmware version
* @cap: Capabilities advertised by the Firmware
* @max_mtu: Maximum support MTU advertised by the Firmware
* @rss_cfg: RSS configuration
* @rss_key: RSS secret key
* @rss_itbl: RSS indirection table
* @rx_filter: Filter offload statistics - dropped packets/bytes
* @rx_filter_prev: Filter offload statistics - values from previous update
* @rx_filter_change: Jiffies when statistics last changed
* @rx_filter_stats_timer: Timer for polling filter offload statistics
* @rx_filter_lock: Lock protecting timer state changes (teardown)
* @max_tx_rings: Maximum number of TX rings supported by the Firmware
* @max_rx_rings: Maximum number of RX rings supported by the Firmware
* @num_tx_rings: Currently configured number of TX rings
* @num_stack_tx_rings: Number of TX rings used by the stack (not XDP)
* @num_rx_rings: Currently configured number of RX rings
* @txd_cnt: Size of the TX ring in number of descriptors
* @rxd_cnt: Size of the RX ring in number of descriptors
* @tx_rings: Array of pre-allocated TX ring structures
* @rx_rings: Array of pre-allocated RX ring structures
* @max_r_vecs: Number of allocated interrupt vectors for RX/TX
* @num_r_vecs: Number of used ring vectors
* @r_vecs: Pre-allocated array of ring vectors
* @irq_entries: Pre-allocated array of MSI-X entries
* @lsc_handler: Handler for Link State Change interrupt
* @lsc_name: Name for Link State Change interrupt
* @exn_handler: Handler for Exception interrupt
* @exn_name: Name for Exception interrupt
* @shared_handler: Handler for shared interrupts
* @shared_name: Name for shared interrupt
* @me_freq_mhz: ME clock_freq (MHz)
* @reconfig_lock: Protects HW reconfiguration request regs/machinery
* @reconfig_posted: Pending reconfig bits coming from async sources
* @reconfig_timer_active: Timer for reading reconfiguration results is pending
* @reconfig_sync_present: Some thread is performing synchronous reconfig
* @reconfig_timer: Timer for async reading of reconfig results
* @link_up: Is the link up?
* @link_status_lock: Protects @link_up and ensures atomicity with BAR reading
* @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter
* @rx_coalesce_max_frames: RX interrupt moderation frame count parameter
* @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter
* @tx_coalesce_max_frames: TX interrupt moderation frame count parameter
* @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW
* @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts
* @qcp_cfg: Pointer to QCP queue used for configuration notification
* @ctrl_bar: Pointer to mapped control BAR
* @tx_bar: Pointer to mapped TX queues
* @rx_bar: Pointer to mapped FL/RX queues
* @debugfs_dir: Device directory in debugfs
*/
struct nfp_net {
struct pci_dev *pdev;
struct net_device *netdev;
unsigned nfp_fallback:1;
unsigned is_vf:1;
unsigned fw_loaded:1;
unsigned bpf_offload_skip_sw:1;
unsigned bpf_offload_xdp:1;
u32 ctrl;
u32 fl_bufsz;
u32 rx_offset;
struct bpf_prog *xdp_prog;
struct nfp_net_tx_ring *tx_rings;
struct nfp_net_rx_ring *rx_rings;
#ifdef CONFIG_PCI_IOV
unsigned int num_vfs;
struct vf_data_storage *vfinfo;
int vf_rate_link_speed;
#endif
struct nfp_cpp *cpp;
struct platform_device *nfp_dev_cpp;
struct nfp_cpp_area *ctrl_area;
struct nfp_cpp_area *tx_area;
struct nfp_cpp_area *rx_area;
struct nfp_net_fw_version fw_ver;
u32 cap;
u32 max_mtu;
u32 rss_cfg;
u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];
u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];
struct nfp_stat_pair rx_filter, rx_filter_prev;
unsigned long rx_filter_change;
struct timer_list rx_filter_stats_timer;
spinlock_t rx_filter_lock;
unsigned int max_tx_rings;
unsigned int max_rx_rings;
unsigned int num_tx_rings;
unsigned int num_stack_tx_rings;
unsigned int num_rx_rings;
int stride_tx;
int stride_rx;
int txd_cnt;
int rxd_cnt;
unsigned int max_r_vecs;
unsigned int num_r_vecs;
struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];
struct msix_entry irq_entries[NFP_NET_MAX_IRQS];
irq_handler_t lsc_handler;
char lsc_name[IFNAMSIZ + 8];
irq_handler_t exn_handler;
char exn_name[IFNAMSIZ + 8];
irq_handler_t shared_handler;
char shared_name[IFNAMSIZ + 8];
u32 me_freq_mhz;
bool link_up;
spinlock_t link_status_lock;
spinlock_t reconfig_lock;
u32 reconfig_posted;
bool reconfig_timer_active;
bool reconfig_sync_present;
struct timer_list reconfig_timer;
u32 rx_coalesce_usecs;
u32 rx_coalesce_max_frames;
u32 tx_coalesce_usecs;
u32 tx_coalesce_max_frames;
__be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS];
u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS];
u8 __iomem *qcp_cfg;
u8 __iomem *ctrl_bar;
u8 __iomem *q_bar;
u8 __iomem *tx_bar;
u8 __iomem *rx_bar;
struct dentry *debugfs_dir;
};
struct nfp_net_ring_set {
unsigned int n_rings;
unsigned int mtu;
unsigned int dcnt;
void *rings;
};
/* Functions to read/write from/to a BAR
* Performs any endian conversion necessary.
*/
static inline u16 nn_readb(struct nfp_net *nn, int off)
{
return readb(nn->ctrl_bar + off);
}
static inline void nn_writeb(struct nfp_net *nn, int off, u8 val)
{
writeb(val, nn->ctrl_bar + off);
}
static inline u16 nn_readw(struct nfp_net *nn, int off)
{
return readw(nn->ctrl_bar + off);
}
static inline void nn_writew(struct nfp_net *nn, int off, u16 val)
{
writew(val, nn->ctrl_bar + off);
}
static inline u32 nn_readl(struct nfp_net *nn, int off)
{
return readl(nn->ctrl_bar + off);
}
static inline void nn_writel(struct nfp_net *nn, int off, u32 val)
{
writel(val, nn->ctrl_bar + off);
}
static inline u64 nn_readq(struct nfp_net *nn, int off)
{
return readq(nn->ctrl_bar + off);
}
static inline void nn_writeq(struct nfp_net *nn, int off, u64 val)
{
writeq(val, nn->ctrl_bar + off);
}
/* Flush posted PCI writes by reading something without side effects */
static inline void nn_pci_flush(struct nfp_net *nn)
{
nn_readl(nn, NFP_NET_CFG_VERSION);
}
/* Queue Controller Peripheral access functions and definitions.
*
* Some of the BARs of the NFP are mapped to portions of the Queue
* Controller Peripheral (QCP) address space on the NFP. A QCP queue
* has a read and a write pointer (as well as a size and flags,
* indicating overflow etc). The QCP offers a number of different
* operation on queue pointers, but here we only offer function to
* either add to a pointer or to read the pointer value.
*/
#define NFP_QCP_QUEUE_ADDR_SZ 0x800
#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ)
#define NFP_QCP_QUEUE_ADD_RPTR 0x0000
#define NFP_QCP_QUEUE_ADD_WPTR 0x0004
#define NFP_QCP_QUEUE_STS_LO 0x0008
#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff
#define NFP_QCP_QUEUE_STS_HI 0x000c
#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff
/* The offset of a QCP queues in the PCIe Target */
#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff)))
/* nfp_qcp_ptr - Read or Write Pointer of a queue */
enum nfp_qcp_ptr {
NFP_QCP_READ_PTR = 0,
NFP_QCP_WRITE_PTR
};
/* There appear to be an *undocumented* upper limit on the value which
* one can add to a queue and that value is either 0x3f or 0x7f. We
* go with 0x3f as a conservative measure.
*/
#define NFP_QCP_MAX_ADD 0x3f
static inline void _nfp_qcp_ptr_add(u8 __iomem *q,
enum nfp_qcp_ptr ptr, u32 val)
{
u32 off;
if (ptr == NFP_QCP_READ_PTR)
off = NFP_QCP_QUEUE_ADD_RPTR;
else
off = NFP_QCP_QUEUE_ADD_WPTR;
while (val > NFP_QCP_MAX_ADD) {
writel(NFP_QCP_MAX_ADD, q + off);
val -= NFP_QCP_MAX_ADD;
}
writel(val, q + off);
}
/**
* nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue
*
* @q: Base address for queue structure
* @val: Value to add to the queue pointer
*
* If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed.
*/
static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val)
{
_nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val);
}
/**
* nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue
*
* @q: Base address for queue structure
* @val: Value to add to the queue pointer
*
* If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed.
*/
static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val)
{
_nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val);
}
static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr)
{
u32 off;
u32 val;
if (ptr == NFP_QCP_READ_PTR)
off = NFP_QCP_QUEUE_STS_LO;
else
off = NFP_QCP_QUEUE_STS_HI;
val = readl(q + off);
if (ptr == NFP_QCP_READ_PTR)
return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask;
else
return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask;
}
/**
* nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue
* @q: Base address for queue structure
*
* Return: Value read.
*/
static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q)
{
return _nfp_qcp_read(q, NFP_QCP_READ_PTR);
}
/**
* nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue
* @q: Base address for queue structure
*
* Return: Value read.
*/
static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q)
{
return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR);
}
/* Globals */
extern const char nfp_net_driver_name[];
extern const char nfp_net_driver_version[];
/* Prototypes */
void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
void __iomem *ctrl_bar);
struct nfp_net *
nfp_net_netdev_alloc(struct pci_dev *pdev,
unsigned int max_tx_rings, unsigned int max_rx_rings);
void nfp_net_netdev_free(struct nfp_net *nn);
int nfp_net_netdev_init(struct net_device *netdev);
void nfp_net_netdev_clean(struct net_device *netdev);
void nfp_net_set_ethtool_ops(struct net_device *netdev);
void nfp_net_info(struct nfp_net *nn);
int nfp_net_reconfig(struct nfp_net *nn, u32 update);
void nfp_net_rss_write_itbl(struct nfp_net *nn);
void nfp_net_rss_write_key(struct nfp_net *nn);
void nfp_net_coalesce_write_cfg(struct nfp_net *nn);
int nfp_net_irqs_alloc(struct nfp_net *nn);
void nfp_net_irqs_disable(struct nfp_net *nn);
int
nfp_net_ring_reconfig(struct nfp_net *nn, struct bpf_prog **xdp_prog,
struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx);
#ifdef CONFIG_NFP_NET_DEBUG
void nfp_net_debugfs_create(void);
void nfp_net_debugfs_destroy(void);
void nfp_net_debugfs_adapter_add(struct nfp_net *nn);
void nfp_net_debugfs_adapter_del(struct nfp_net *nn);
#else
static inline void nfp_net_debugfs_create(void)
{
}
static inline void nfp_net_debugfs_destroy(void)
{
}
static inline void nfp_net_debugfs_adapter_add(struct nfp_net *nn)
{
}
static inline void nfp_net_debugfs_adapter_del(struct nfp_net *nn)
{
}
#endif /* CONFIG_NFP_NET_DEBUG */
void nfp_net_filter_stats_timer(unsigned long data);
int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf);
#endif /* _NFP_NET_H_ */
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